mechBgon, as soon as I get my UT CD back from my friend, I'll run the benchmark. Just to let you know, however, I think a lot of this benchmark will depend on your HD as well as memory and CPU. So, since I have a RAID array with 2 40GB IBM 120GXP's, I'm not sure how well we can compare. But I'll be more than happy to oblige!
And as for what Anand said about HT...
His thoughts were posted on current applications. Most applications for consumers today are not multithreaded, so they will not realize much of a benefit from HT at all. And there are also certain operations which do not benefit from HT at all. I believe Intel is working with programmers to create a compiler that will allow an HT-enabled CPU to execute certain portions of code that would not benefit from HT in "non HT mode".
When Hyperthreading was first announced, Intel was touting a 30% performance boost in Maya, an application which does take advantage of multiple threads. I think the most professional CAD/3D rendering programs (especially 3D rendering programs) will benefit from HT, since they pretty much all take advantage of multiple threads.
I think that once developers begin to recognize how to take advantage of HT, that we will see only performance boosts coming from this technology. And I'm sure that these boosts won't be immediate, just like with SSE2. I think that as HT matures, and compilers and programmers improve, that HT will make a significant difference in performance. Otherwise, I don't think Intel would have invested the resources in such a technology needed to bring it to the mainstream desktop. However, I do know that HT will currently add to the value of any workstation in a professional graphics environment (which is where I work).
DISCLAIMER: I do not own a Hyperthreading-enabled processor.